COMPARATIVE ANALYSIS OF CORROSION INHIBITOR EFFECTIVENESS FOR ALUMINIUM PROTECTION
Abstract
Corrosion poses a significant challenge in the use of aluminum, particularly Aluminum 6061, which, despite its favorable strength-to-weight ratio, is highly susceptible to degradation in aggressive environments such as acidic, alkaline, and saline media. While synthetic chemical inhibitors are commonly employed to mitigate corrosion, their environmental impact raises substantial concerns. This study aims to compare the effectiveness of coconut oil, palm oil, and soybean oil as eco-friendly corrosion inhibitors for Aluminum 6061 in three corrosive environments: HCl (acidic), NaOH (alkaline), and NaCl (saline) solutions. A quantitative experimental approach was employed using the weight-loss method to evaluate the corrosion rate based on mass changes before and after exposure. The findings indicate that all three vegetable oils significantly reduce the corrosion rate compared to untreated specimens. Coconut oil exhibited the highest inhibitory performance, followed by soybean oil and palm oil. This effectiveness is attributed to the organic compounds and fatty acids in the oils, which adsorb onto the metal surface and form a protective layer that limits interaction with corrosive ions. These results support the development of sustainable, bio-based corrosion inhibition technologies as viable alternatives to synthetic chemicals, with promising applications across industries that utilize aluminum.
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